scylla-jmx/src/main/java/org/apache/cassandra/metrics/DroppedMessageMetrics.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * Copyright (C) 2015 ScyllaDB
 */
/*
 * Moddified by ScyllaDB
 */

package org.apache.cassandra.metrics;

import java.util.concurrent.TimeUnit;

import org.apache.cassandra.net.MessagingService;

import com.scylladb.jmx.metrics.APIMetrics;
import com.scylladb.jmx.metrics.DefaultNameFactory;
import com.scylladb.jmx.metrics.MetricNameFactory;
import com.yammer.metrics.core.APISettableMeter;

/**
 * Metrics for dropped messages by verb.
 */
public class DroppedMessageMetrics {
    /** Number of dropped messages */
    public final APISettableMeter dropped;

    private long lastDropped = 0;

    public DroppedMessageMetrics(MessagingService.Verb verb) {
        MetricNameFactory factory = new DefaultNameFactory("DroppedMessage",
                verb.toString());
        dropped = (APISettableMeter) APIMetrics.newSettableMeter(
                factory.createMetricName("Dropped"), "dropped",
                TimeUnit.SECONDS);
        dropped.stop();
    }

    @Deprecated
    public int getRecentlyDropped() {
        long currentDropped = dropped.count();
        long recentlyDropped = currentDropped - lastDropped;
        lastDropped = currentDropped;
        return (int) recentlyDropped;
    }

    public APISettableMeter getMeter() {
        return dropped;
    }
}